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C $Header: /u/u3/gcmpack/MITgcm/pkg/bulk_force/bulkf_forcing.F,v 1.3.4.1 2003/10/02 18:18:33 adcroft Exp $ |
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C $Name: $ |
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c swd -- bulkf formula pkg |
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|
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#include "BULK_FORCE_OPTIONS.h" |
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|
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subroutine bulkf_forcing( bi,bj, |
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I mycurrenttime, |
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I mycurrentiter, |
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I mythid |
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I ) |
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|
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c ================================================================== |
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c SUBROUTINE BULKF_FORCING |
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c ================================================================== |
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c |
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c o Get the surface fluxes used to force ocean model |
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c Output: |
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c ------ |
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c ustress, vstress - wind stress |
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c qnet - net heat flux |
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c empmr - freshwater flux |
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c --------- |
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c |
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c Input: |
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c ------ |
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c uwind, vwind - mean wind speed (m/s) at height hu (m) |
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c Tair - mean air temperature (K) at height ht (m) |
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c Qair - mean air humidity (kg/kg) at height hq (m) |
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c theta(k=1) - sea surface temperature (K) |
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c rain - precipitation |
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c runoff - river(ice) runoff |
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c |
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c ================================================================== |
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c SUBROUTINE bulkf_forcing |
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c ================================================================== |
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|
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implicit none |
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|
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c == global variables == |
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|
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#include "EEPARAMS.h" |
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#include "SIZE.h" |
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#include "PARAMS.h" |
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#include "DYNVARS.h" |
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#include "GRID.h" |
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#include "FFIELDS.h" |
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#ifdef ALLOW_BULK_FORCE |
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#include "BULKF.h" |
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#include "BULKF_INT.h" |
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#include "BULKF_DIAG.h" |
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#endif |
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#ifdef ALLOW_THERM_SEAICE |
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#include "ICE.h" |
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#endif |
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c == routine arguments == |
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|
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integer mythid |
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integer mycurrentiter |
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_RL mycurrenttime |
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integer bi,bj |
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|
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C == Local variables == |
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integer i,j,k |
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|
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#ifdef ALLOW_BULK_FORCE |
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|
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|
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_RL df0dT,hfl |
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|
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c variables to include seaice effect |
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_RL tmp |
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_RL albedo |
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integer iceornot |
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|
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c == external functions == |
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|
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#endif /* ALLOW_BULK_FORCE */ |
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|
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c determine forcing field records |
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|
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#ifdef ALLOW_BULK_FORCE |
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|
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k = 1 |
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do j = 1-oly,sny+oly |
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do i = 1-olx,snx+olx |
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if (hFacC(i,j,1,bi,bj).ne.0.0) then |
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#ifdef ALLOW_THERM_SEAICE |
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if (ICEMASK(i,j,bi,bj).gt.0.d0) then |
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tmp=Tsrf(i,j,bi,bj) |
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if (snowheight(i,j,bi,bj).gt.3.d-1) then |
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iceornot=2 |
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else |
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iceornot=1 |
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endif |
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else |
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tmp=theta(i,j,1,bi,bj) |
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iceornot=0 |
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endif |
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#else |
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tmp=theta(i,j,1,bi,bj) |
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iceornot=0 |
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#endif |
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|
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|
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call BULKF_FORMULA_LANL( |
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& uwind(i,j,bi,bj), vwind(i,j,bi,bj), |
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& wspeed(i,j,bi,bj), Tair(i,j,bi,bj), Qair(i,j,bi,bj), |
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& cloud(i,j,bi,bj), tmp, |
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& flwup(i,j,bi,bj), flh(i,j,bi,bj), |
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& fsh(i,j,bi,bj), df0dT, |
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& ustress(i,j,bi,bj), vstress(i,j,bi,bj), |
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& evap(i,j,bi,bj), savssq(i,j,bi,bj), |
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& iceornot, readwindstress) |
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|
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C Note that the LANL flux conventions are opposite |
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C of what they are in the model. |
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|
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cQQ use down long wave data |
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flwupnet(i,j,bi,bj)=flwup(i,j,bi,bj)-flw(i,j,bi,bj) |
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cQQ using down solar, need to have water albedo -- .1 |
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#ifdef ALLOW_THERM_SEAICE |
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if (ICEMASK(i,j,bi,bj).gt.0.d0) then |
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call sfc_albedo(ICEHEIGHT(i,j,bi,bj), |
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& SNOWHEIGHT(i,j,bi,bj), |
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& Tsrf(i,j,bi,bj), |
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& sage(i,j,bi,bj), albedo) |
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else |
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albedo=.1 |
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endif |
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#else |
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albedo=.1 |
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#endif |
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fswnet(i,j,bi,bj)=solar(i,j,bi,bj)*(1.d0-albedo) |
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else |
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ustress(i,j,bi,bj) = 0. _d 0 |
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vstress(i,j,bi,bj) = 0. _d 0 |
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fsh(i,j,bi,bj) = 0. _d 0 |
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flh(i,j,bi,bj) = 0. _d 0 |
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flwup(i,j,bi,bj) =0. _d 0 |
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evap(i,j,bi,bj) =0. _d 0 |
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fswnet(i,j,bi,bj) =0. _d 0 |
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savssq(i,j,bi,bj) =0. _d 0 |
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endif |
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enddo |
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enddo |
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|
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|
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if ( .NOT.readwindstress) then |
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cswd move wind stresses to u and v points |
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do j = 1,sny |
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do i = 1,snx |
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fu(i,j,bi,bj)= |
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& (ustress(i,j,bi,bj)+ustress(i-1,j,bi,bj))/2* |
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& maskW(i,j,1,bi,bj) |
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fv(i,j,bi,bj)= |
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& (vstress(i,j,bi,bj)+vstress(i,j-1,bi,bj))/2* |
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& maskS(i,j,1,bi,bj) |
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enddo |
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enddo |
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endif |
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c |
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c |
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c Add all contributions. |
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k = 1 |
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do j = 1,sny |
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do i = 1,snx |
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if (hFacC(i,j,1,bi,bj).ne.0.0) then |
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c Net surface heat flux. |
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hfl = 0. _d 0 |
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hfl = hfl + fsh(i,j,bi,bj) |
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hfl = hfl + flh(i,j,bi,bj) |
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hfl = hfl + flwupnet(i,j,bi,bj) |
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c QQ minus solar for ncep data |
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c QQ plus solar for dasilva |
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c hfl = hfl - solar(i,j,bi,bj) |
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cQQ for calculated sw net |
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hfl = hfl - fswnet(i,j,bi,bj) |
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c Heat flux: |
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Qnet(i,j,bi,bj) = -hfl*maskc(i,j,k,bi,bj) |
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cswdcou -- add --- |
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#ifdef COUPLE_MODEL |
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dFdT(i,j,bi,bj) = df0dT |
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#endif |
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cswdcou -- end add --- |
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c Salt flux from Precipitation and Evaporation. |
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EmPmR(i,j,bi,bj) = (-evap(i,j,bi,bj)+rain(i,j,bi,bj) |
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& - runoff(i,j,bi,bj))*maskc(i,j,k,bi,bj) |
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|
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cccccccccccCHEATccccccccccccccccccccccccc |
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c Qnet(i,j,bi,bj) = Qnetch(i,j,bi,bj) |
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c EmPmR(i,j,bi,bj) = EmPch(i,j,bi,bj) |
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cccccccccccccccccccccccccccccccccccccccccc |
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else |
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Qnet(i,j,bi,bj) =0.d0 |
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EmPmR(i,j,bi,bj)=0.d0 |
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cswdcou -- add --- |
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#ifdef COUPLE_MODEL |
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dFdT(i,j,bi,bj) = 0.d0 |
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#endif |
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cswdcou -- end add --- |
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endif |
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enddo |
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enddo |
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|
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|
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cc Update the tile edges. |
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c _EXCH_XY_R8(Qnet, mythid) |
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c _EXCH_XY_R8(EmPmR, mythid) |
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c _EXCH_XY_R8(fu , mythid) |
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c _EXCH_XY_R8(fv , mythid) |
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|
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|
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#ifdef ALLOW_TIMEAVE |
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call BULKF_AVE(bi,bj,mythid) |
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#endif /*ALLOW_TIMEAVE*/ |
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|
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#endif /*ALLOW_BULK_FORCE*/ |
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|
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return |
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end |
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